从零开始学习Node.js例子五 服务器监听

httpsnifferInvoke.js

var http = require('http');

var sniffer = require('./httpsniffer');



var server = http.createServer(function(req, res){

    res.writeHead(200, {'Content-Type': 'text/plain'});

    res.end('Hello, World!\n');

});



sniffer.sniffOn(server);

server.listen(3000);

httpsniffer.js

//http sniffer 监听每个服务器事件，然后输出每个事件的相关信息

var url = require('url');

var util = require('util');



exports.sniffOn = function(server){

    server.on('request', function(req, res){

        util.log('e_request');

        util.log(reqToString(req));

    });



    server.on('close', function(error){

        util.log('e_close error=' + error);

    });



    server.on('checkContinue', function(req, res){

        util.log('e_checkContinue');

        util.log(reqToString(req));

        res.writeContinue();

    });



    server.on('upgrade', function(req, socket, head){

        util.log('e_upgrade');

        util.log(reqToString(req));

    });



    server.on('clientError', function(){

        util.log('e_clientError');

    });

}



var reqToString = function(req){

    var ret = 'request' + req.method + ' ' + req.httpVersion + ' ' + req.url + '\n';

    ret += JSON.stringify(url.parse(req.url, true)) + '\n';

    var keys = Object.keys(req.headers);

    for (var i = 0; i < keys.length; i++){

        var key = keys[i];

        ret += i + ' ' + key + ': ' + req.headers[key] + '\n';

    }

    if (req.trailers) ret += req.trailers + '\n';

    return ret;

}



exports.reqToString = reqToString;